Chusetts



PATENTED FEB. 16, 1904.

W. W'ATTIE. $HED FORMING MECHANISM FOR LOOMS.

APPLICATION FILED DEG. 17, 1903.

4 SHEETS-SHEET 2 R0 MODEL.

m-zeW THE NCIRKX: PETR$ cg. moYourr-mCwaswmTom. u a.

PAIENTED FEB. 16, 1904.

N0. 752,316. W. WATTIE.

SHED FORMING MECHANISM FOR LOOMS.

. APPLICATION FILED DEC. 17, 1903.

4 SHEETS-SHEET 3.

' no MODEL;

- a v H PA-TENTED FEB. 16, 1904..

W. WAYTTIE. SHED FORMING MECHANISM FOR Looms.

APPLICATION FILED DEC. 17. 1903.

4 SHEETS-SHEET 4' N0 MODEL.

Wm/mow I Patented February 16, 1904.

UNITED STATES PATENT OFFICE.

WILLIAM WATTIE, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO OROIMIPTON & KNOWLESLOOM WORKS, OF WORCESTER, MASSA- CHUSETTS, A CORPORATION OF MASSACHUSETTS.

SHED-FORMING MECHANISM FOR LOOMS.

SPEGIFIGA'IION forming part of Letters Patent No. 752,316, dated February 16, 1904. 7 Application filed December 1?, 1903. Serial No. 185,479. (No model.) i i To whom it may concern: 7

Be it known that I, WILLIAM WVATTIE, a citizen of the United States, residing at Worcester, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Shed-Forming Mechanism for Looms, of which the following is a specification.

My invention relates to shed-forming mechanism for looms, and more particularly to a harness-motion in which two harnesses are used, ordinarily termed a two-harness motion. One harness is raised when the other is lowered, and vice versa.

The object of my invention is to improve upon the ordinary construction of the shedforming mechanism in the class of looms referred to and to provide a strong and eflicient mechanism to positively raise and lower the harnesses and raise the back harness higher than the front harness and cause a dwell of the harnesses in their upper and lower positions when the shuttle passes through the shed.

My inventionconsists in certain novel fea tures of construction of my improvements, as will be hereinafter described.

I have only shown in the drawings suflicient parts of a loom with my improvements thereon to enable those skilled in the art to which my invention belongs to understand the construction and operation of the same.

Referring to the drawings, Figure 1 is a central vertical section through the loom anda harness-motion embodying my improvements, taken at a point indicated by line 1 1', Fig. '2, looking in the direction of arrow (0, same figure. Fig. 2 is a sectional front view of the parts shown in Fig. 1, taken at a point indicated by line'2 2, Fig. 1, looking in the direction of arrow 6, same figure. Some of the parts shown in Fig. 1 are not shown' in this figure. Fig. 3'is a central vertical section through a loom and a harness-motion, taken at a point indicated by line 3 3, Fig. 4, looking in the direction of arrow 0, same figure, and showing a modified construction of my improvements. Fig. 4 is asectional front view of the parts shown in Fig. 3, taken at a point indicated by line 4 4, Fig. 3, looking in the direction of arrow a, same figure. Some -of the parts shown in Fig. 3 are not shown in this figure. Fig. 5 shows, on an enlarged scale, a detached portion of the pinion-andrack mechanism; and Fig. 6 shows a modified construction of the pinion-and-rack mechanism shown in Fig. 5.

In the accompanyingdrawings,Figs. 1 and 2, the loom sides or frames 1, the arch 2, the lay 3, the connection from the lay 3 to the crankshaft 4, which is geared to the bottom or cam shaft 5, as indicated by broken lines in Fig.

1, the let-ofii roll 6, and the take-up roll 7 are. I

all of the ordinary and wellknown-'construc tion in looms havlng a two-harness motion.

I will now describe my lmprovements which rock-shaft 8 is mounted above the two barnesses 9 and 10 in suitable bearings 11' on brackets 11, secured to the arch 2-. A second rock-shaft 12is mounted below the two har- 5 relate particularly to the harness-motion. A

nesses 9 and 10 in suitable bearings 13 on the loom sides 1. Fast on the rock-shaft 8 are two pairs of pulleys 14 and 15. One pair, as 14, 1s of larger diameter than the other pair, and

each pulley 14 has one end of a strap or flexible band 16 secured thereto to bewound and unwound thereon as the shaft 8 rotates first in one direction and then in the other. The other end of the straps 16 is in this instance attached to one end of an adjustable connector or link 17, and the other end of the connector 17 is attached to the upper edge of the back harness 9. The other pair of pulleys, 15, fast on the rock-shaft 8, are of a little less diameter than the pulleys 14, and each pulley has one-end of a strap or flexibleband 19 secured thereto to gaging the shaft 8, as shown in Fig. 1.

16 and 19 through connectors or links 17 and 20 to the lower edges of the harnesses 9 and in the same manner as the straps 16 and 19. The larger diameter of the pulleys 14 and 14 on the rock-shafts 8 and 12 will cause the rear harness 9 to be raised higher and to be lowered more than the front harness 10.

I will now describe the mechanism shown in Figs. 1 and 2 for simultaneouslyrotating the shafts 8 and 12 first in one direction and then in the other to positively raise and lower the two harnesses 9 and 10 and cause a dwell of the harnesses in their two extreme positions. On the upper rock-shaft 8, near the ends thereof, are fast two pinions 21, and fast on the lower rock-shaft 12, near the ends thereof and in vertical linewith the pinions 21, are

. fast two pinions 22. Two vertically-moving parallel rods 23 have secured to their upper ends a rack 24, each of which meshes with a pinion 21, fast on the rock-shaft 8, and is held in engagement there with by a strap 25, secured to the rack-24 and extending back of and Znttached to the lower ends of the vertically-moving rods 23 are two racks 26, each of which engages with a pinion 22, fast on the lower rock-shaft 12, and is held in engagement therewith by a strap 27, secured to the rack 26 and extending back of and engaging the shaft 12, as shown in Fig. 1. A vertical motion is communicated in this instance simultaneously to each of the vertically-moving rods 23 (to communicate,'through racks 24 and 26 and pinions 21 and 22, a simultaneous rocking motion to the shafts 8 and 12 to cause, through pulleys 14 and and 14 and 15 and strap connections to the harnesses 9 and 10, a positive raising and lowering of the harnesses) by a cam 28, fast on the bottom shaft 5, having in this instance a cam-groove 28 in one face thereof, into which extends and travels a roll 29 on a lever 29, pivoted at one end on a stud 30 on a bracket 31, secured to the loom side 1, and pivotally connected at its other end to a link 32. The other end of said link 32 is pivotally connected with a projection 23 on the verticallymoving rod 23.

It will be understood that there is a cam 28 and intermediate mechanism for each vertically-moving rod 23. (See Fig. 2.)

The shape of the cam 28 is such that when the harnesses 9 and 10 are in their extreme positions there is a dwell of the harnesses while the shuttle passes through the shed.

I have shown in Figs. 3 to 6, inclusive, a modified construction of the mechanism for operating the vertically-moving rack-rods which through intermediate connections operate the harnesses. In said figures I have lettered similar parts with the same letters used in Figs. ,1 and 2.

I will now describe the modified construction of the operating mechanism shown in Figs. 3 to 6, inclusive. The lay 3, as shown in Fig. 3, is operated from the bottom shaft 5. A pinion 33, eccentric to the bottom shaft 5 and fastened thereon, meshes with and drives an elliptic gear 34, fast on the end of a shaft 35, mounted in bearings 36 on a stand 36. (See Fig. 4.) Fastv on the other endof the shaft is an arm 37, pivotally connected by a pin 38 with one end of a link 39. The other end of the link 39 is pivotally connected to an ear 40 on the vertically-moving rack-bar 40. (See Fig. 4.) The vertically-moving rack-bar 40 has a rack or teeth on its upper and lower ends, which engage the pinions 21 and 22, fast on the rock-shafts 8 and 12, to raise and lower the harnesses 9 and 10, as above described in connection with Figs/1 and 2. The racks on the rack-bar 4 0 are held in engagement with their pinions by grooved rolls 41, located back of and in engagement with the rear edge of the rack-bar 40, as shown in Fig. 3 and also in Fig. 5. I

It will be seen that by means of the pinion 33 and the elliptic gear 34 an intermittent rotary motion of the shafts 8 and 12 is obtained to cause a dwell of the harnesses in their extreme positions while the shuttle is passing through the shed.

In Fig. 6 is shown a modified construction of the mechanism for obtaining a dwell of the harnesses. In said figure the rock-shaft 8 has an elliptic gear 42 mounted thereon, which engages with the teeth on one edge of the vertically-moving rack-bar 43 to be operated thereby. On the opposite edge of the rackbar 43 are a second set of teeth, which are engaged by the teeth on a second elliptic gear 44, loose on a stud 45.

The rotation of the elliptic gear 42 will at regular intervals cause a dwell in the rotation of the rock-shaft 8 and also a dwell in the movement of the harnesses. The second elliptic gear 44 acts to hold the gear 42 in mesh with the rack-bar 43.

The revolution of the elliptic gear 42 by the rack-bar 43 causes a dwell of the harnesses in their extreme positions, when the shuttle is thrown through the shed.

It will be understood that the details of construction of my improvements may be varied, if desired, and the same are adapted to be applied to any looms of well-known construction and operation to positively raise and lower the harnesses in the manner above described.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In the shedding motion of a loom, the combination with two harnesses, a rock-shaft above, and a rock-shaft below the harnesses,

two pairs of pulleys on each rock-shaft, congage a pinion on each shaft, and said pinions, and means for operating said bar, substantially as shown and described.

2. In the shedding motion of a loom, the combination with two harnesses, a rock-shaft above, and a rock-shaft below the harnesses, two pairs of pulleys on each rock-shaft, one pair of greater diameter than the other, flexible connections attached to said pulleys, and adjustable connections intermediate said flexible connections and the harnesses, of means for simultaneously rotating both shafts, first in one direction and then in the other, to raise and lower the harnesses, said means consisting of a vertically-moving bar having rack-teeth to engage a pinion fast on each rock-shaft, and said pinions, and means for holding the racks in contact therewith, and means for opcrating said bar, substantially as shown and described.

3. In the shedding motion of a loom, the combination with two harnesses, a rock-shaft above, and a rock-shaft below the harnesses, two pairs of pulleys on each rock-shaft, one pair of greater diameter than the other, flexible connections attached to said pulleys, and adjustable connections intermediate said flexible connections and the harnesses, of means for simultaneously rotating both shafts, first in one direction and then in the other, to raise and lower the harnesses, said means consisting of a vertically-moving bar having rack-teeth to engage aopinion fast on each rock-shaft,

and said pinions, and means for holding the of means for communicating a simultaneous intermittent rotary motion to both rock-shafts, first in one direction and then in the other, to raise and lower the harnesses, said means consisting of a vertically-moving bar having rackteeth thereon to engage a pinion or gear on,

each rock-shaft, and said pinions or gears, and means for operating said bar, substantially as shown and described.

WILLIAM WATTIE.

Witnesses:

.' J C. DEWEY,

M. HAAs, 

